First off, is your computer using three 8GB sticks of RAM? That's the only way that you'll be able to fit 24GB of RAM on that motherboard, which has only four DIMM slots. (If your 24GB kit is comprised of six 4GB sticks, you'll be able to use only four of the sticks for a total of 16GB.)

Secondly, if you are using only three sticks of RAM, I'd strongly recommend either adding a fourth for a total of 32GB or removing one of the sticks for a total of 16GB. That's because using three sticks of RAM on a platform with a dual-channel memory controller will only force single-channel-only operation or (in the case of the Intel platforms) a hybrid of dual- and single-channel operation (where the first 16GB runs in dual-channel and the remaining 8GB runs in single-channel).

Third, with such a relatively long timeline, I'd recommend doing some overclocking of the CPU. However, you don't need an extreme overclock to 4.7+ GHz: Even a moderate overclock to 4.2GHz should suffice.